(under the class definition) Apparatus in which the rotary expansible chamber device is of the sliding vane type and included in the vane slot thereof for engagement with the vane is either an insert of suitable material to absorb wear or a rolling means for the prevention of wear.
SEE OR SEARCH THIS CLASS, SUBCLASS:
104, for a biased insert providing a seal means between the vane and the vane slot.
241, for oscillating bearings mounted in walls of the working member through which vanes slide.
